JCL for z/OS MVS

Duration:   5 days

Participants:   Application developers, programmers, operations and operation support, and systems support personnel.

Objectives:   Upon successful completion of this course you will be able to: -  Create efficient job streams, containing JCL and JES statements, to execute programs and invoke procedures. -  Code PROCs to execute application programs and utilities. -  Write JCL and control statements to execute a variety of utilities including SORT, IEBGENER, IDCAMS, etc. -  Execute "compile, link, and go" PROCs, using appropriate overrides and symbolic substitutions, to test application programs. -  Optional.  Code linkage editor JCL, PARMs, and control statements to link multi-module programs. -  Implement relatively new JCL features including IF, SET, INCLUDE, and SMS classes (management class, storage class, and data class). -  Diagnose and correct JCL errors and read the JES JOB LOG. -  Optional.  Look up abend and other error messages in www.ibm.com softbooks, Book Manager, and/or Quick Ref.

Overview:   This course teaches the fundamentals of JCL coding, and uses a variety of popular utility programs to illustrate the concepts and also allow students to practice coding JCL in the workshops. -  Depending on the audience, this course can focus on the needs of programmers (CLG PROCs and the Linkage Editor), operations (additional focus on diagnosing and correcting errors and omitting PROC writing), or support (focusing more on PROC writing and RESTART considerations). -  A separate course is available for creating and managing VSAM files using IDCAMs.

Prerequisites:   Experience using TSO/ISPF is required.

Format:   Lecture and discussion with extensive hands-on exercises. Utilities are used in this course to provide meaningful machine exercises.

Topic Outline:   -  Introduction         z/OS basic architecture and terminology         JES processing (JES 2 or JES 3)         JCL facilities and options         JCL syntax and coding rules         Positional and keyword parameters         Overview of reference materials         Impact of the Storage Management Subsystem (SMS)         Impact of promoted and new DD parameters -  Job Streams         JOB statement format and parameters              Accounting information              Programmer name              TIME              REGION              COND              MSGCLASS              MSGLEVEL              PRTY              CLASS              NOTIFY              TYPRUN              PERFORM              GROUP              RD              RESTART         EXEC statement format and parameters              PGM              PROC              TIME              PARM              COND              RD         Executable modules              Source, object, and load modules              Libraries         Basic DD statements              Instream              Print              Disk input              Disk output              DUMMY         COND to control step execution              Processing program return codes              Abend processing              Forcing job-stream flow         IF THEN ELSE END-IF to control step execution -  File Management and Processing         Dataset organizations - DSORG         Dataset access methods (overview)              QSAM:  physical sequential              BPAM:  partitioned (PDS)              VSAM:                Key-sequenced (KSDS)                Entry-sequenced (ESDS)                Relative-record (RRDS)         Record formats - RECFM              Fixed              Variable              Undefined              Blocked              ASCII         Spool file processing - DD * and DD SYSOUT=              Input stream records              Print-image and spooled output              Relationship to OUTPUT statement         System catalog         Buffer processing         VSAM processing              AMP              AMORG              BUFND              BUFNI              BUFSP              Others         DASD files              Space utilization              Device characteristics              Maximizing storage              Blocking considerations              Defensive space allocation strategies         Tape processing              Data storage format              Label formats and processing, LABEL              Blocking considerations              Device characteristics and device utilization         Storage Management Subsystem (SMS)              Definition and use of:                   DATACLAS                   MGMTCLAS              SMS-managed datasets              Automatic class selection routines              Matching data requirements with storage devices              Coding SMS-related changes to JCL -  DD Statements         DD statement parameters              *              DATA              DLM              DUMMY              DYNAM              DSNAME              DISP              UNIT              VOLUME              SPACE              SYSOUT              COPIES              OUTLIM              HOLD              DEST              DCB              LRECL              BLKSIZE              OPTCD              RECFM              DSORG              BUFNO              AMP              BUFSP              BUFNI              BUFND              AMORG         Special DD statements              JOBLIB              STEPLIB              JOBCAT              STEPCAT              SYSABEND              SYSUDUMP         UNIX JCL (Optional)         ESA changes              SMS              Promoted parameters         z/OS new features (Optional) -  Other Statements         OUTPUT         Null statement         Data delimiter         Comment statement         JES control statements         INCLUDE         SET -  Procedures         Cataloged procedures         Private procedure libraries         PROC statement         Using existing PROCs              Symbolic parameters              Overriding symbolic variables              Modifying EXEC parameters              Adding DD and OUTPUT statements              Overriding DD statements              Step-to-step references              Overriding concatenated DDs, especially libraries              DDNAME         Designing and coding PROCs         Testing PROCs -  Dataset concatenation -  Referbacks on         PGM         VOL         UNIT         DSN         DCB -  GDGs (Generation Data Groups) and GDSs (Generation Datasets)         Creating GDGs and GDSs         Absolute and relative names         DCB=model (old method)         LIKE and REFDD (new method)         Restart considerations         Managing the generations -  RESTART Considerations         Dangers         Limitations

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